Peak Design Travel Backpack 45L

Meets international carry-on size requirements, but expands to be a 45L gear-hauler and collapses to be a 35L day bag, making it unmatched for 1-bag travel. Quick-access pockets for keys, glasses, passport, etc. Hugely expandable side pockets for water bottles, tripods, and more. Padded laptop + tablet sleeves. Main cavity is divisible into 2 compartments via a zippered mesh sleeve. 360-degree grab handles. Cleverly concealed external carry straps. All packed within a sleek, weatherproof nylon canvas shell with bottom liner. Only used for one short trip. Selling because I don't travel enough/don't really need it